Securing device



y 1935- F. E. SINCLAIR 2,001,752

SECURING DEVICE Filed May 25, 1931 EMA-mm.

Patented May 21, 1935 j UNITED STATES PATENT OFFICE t E. assitnor .Sullivan Machinery Company, a corporation of Massachusetts i Application May 23,1931,;Serlal No. 533,512 s Claims. (01.287-425) This invention relates, to securingdevices, and series'of impact blows to the shankof the pickmore particularly to securing: devicesfor lock-, ing tool and the supply of pressure fluid to the ingtogether a pluralityof relatively rotatable, motor cylinder is controlled by an automatic threadedly connected parts. j fluid distributing valvellof a well known design. 5 An object of this invention is to provide an The valve 9 is arranged within; a valve chest Ill 5 improved securing" device.' Another object is to arranged within a detachable rear head member provide an improved securing device for holding II. The rear end of the motor cylinder is a plurality of relatively rotatable, threadedly threadedly connected at [2 by right hand threads connected parts together; I A further object is to within the rear head; H, and the improved se- 10. provide an improved securing device in theform curing device is associate d with the cylinder and 0 i of. a wedge coacting with a plurality of relatively rear head for maintaining the threaded joint l2, rotatable, threadedly, connected parts for lockbetween the parts, tight. It will, however, be ing the threaded joint therebetween against reunderstood that the improved securing device lease. Yet another object is to provide: an im-. may be incorporated in various other tools whereproved securing device of. the aforesaid'char in afplurality of relatively rotatably threaded 5 acter which comprises a wedge element disposparts are desired to be locked together. able in a slot'in' one part and an annular groove The improved securing device, as mentioned in the other part, so that the wedge may'jbe above; is associated with the cylinder 1 and rear driven into the space formed by. the slotand head II for maintainingthe threaded joint I2 grooveinto its tightened position to lockthe therebetween, when tightened, against loosening, 20

' threaded joint between the parts againstltjosenherein dueto thevibrating action of the tool. These and other objects and advantages. of This securing device herein comprises a slot l3 this invention will, however, hereinafteumore formedtransversely in the head II and an anfully appear in the courseiof the following jde nular groove l4 formed on the periphery of the scription and as more particularly pointed out in cylinder l, herein on that portion of the periph- 25 the appended claims. I l cry of the cylinder which fits within a bore l5 In the accompanying drawingthere is shown formed in the head ll. Cooperating with the for purposes of illustration one form which the slot and groove and disposable in the space invention may assume in practice. formed bytheslot and groove is a wedge member In this drawing,- l l6 having a driving head I! at one end. The 30 Fig. 1 is a side elevational view of a pneumatic other end of the wedge is threaded at l8 to repick of the percussive type having embodied ceive a tightening and holding nut IS. The therein. the illustrative form of the improved wedgehas its planeangle, i. e the angle between securing device. its angularly extending wedging surfaces in a Fig. 2 is a longitudinal sectional view. taken plane parallel to the axis of the threaded con- 35 through the percussive motor shown in Fig. 1 and nection.

showing the securing device and its associated 'It will thus be seen that when the head II. is parts in detail. a I tightly threaded onto the cylinder I, the wedge Fig. 3 is a detail sectional View. taken on line I6 may be driven, byblows struck against the 40 3-4 of. Fig. 2. headl'l or by rotation of the nut 19, into the 40 In'this illustrative construction there is shown space provided by the slot and groove, thereby a. pneumatic pick of the percussive type generally to wedge the parts together and prevent loosen- .comprising a hammer motor I having a supporting of ithethreaded joint l 2 between the parts, ing handle 2 which carries a usual throttlevalve and that irrespective of the relative angular posi- 3 for controlling the supply of pressure fluid from tions of the head andcylinder, the threaded joint 45 ahose connection 4 through the handle 2 to the may be held tight. The reason for this will be hammer motor I which is herein of thepressure readily appreciated. The shoulder at the upper fluid actuated reciprocating piston type. This side of annular groove I4 engages the top surhammer motor is adapted to actuate perousface of the wedge, while the lower surface of .50 sively a picking tool 5 held inposition within the the wedge engages theshoulder' at the lower side forward end of the hammer. motor by a coiled of the slot I 3. Rotation of the cylinder relative spring, etalnerfi of a well known design. In the to the head to separate them would involve lesspresentcohstruction, the hammer motor comeningthe distance between the shoulders menprises a cylinder 1 having reciprocably mounted tioned, andthisthe wedge prevents.

therein a hammer piston 8 adapted to deliver a As a result of this invention, it will be noted 55 that an improved securing device is provided which may be applied to various types of tools wherein it is desired to look a plurality of relatively rotatable threadedly connected parts together. It will further be noted that an improved securing device is provided of an extremely simple and rugged design and may be readily applied to a tool of standard'construction with a'minimum of change, it being necessary only to provide a slot in one part and a groove in the other so that the locking wedge may be driven in the slot and groove. It will still further be evident that by the provision of the slot in one part and the annular groove in the other, the wedgemay be driven into position without positioning the relatively rotatable parts in a predetermined manner, and as a result, the joint 12 between the parts when worn may be tightened simply by releasing the wedge, turning the parts relative to each other, and then again driving the wedge in position. These and other advantagesof the improved securing device will be clearly apparent to those skilled in the art. I

While there is in this' application specifically described one form which the invention may assume in practice, it will be understood that this form of the invention is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the formed by said slot and groove and acting to effect relative movement of said parts in a direction axially of said threaded joint, to bind the threads. I

2. A securing device for locking the threaded joint between a pair'of relatively rotatable parts against loosening, irrespective of their position of relative rotation, comprising portions forming a recess on one of said parts and portions forming a recess on the other of said parts, said recesses cooperating irrespective of the position of relative rotation between said parts to form a transverse wedge-receiving opening, and a wedge driven in said opening andengaging said parts and acting longitudinally of the axis of said parts to move said parts in a direction to bind the threads. I

3. A securing device for locking the threaded joint between a pair of relatively rotatable parts against loosening, irrespective of their positions of relative rotation, comprising portions, in part on one of said parts and in part on the other thereof, cooperating in all positions of relative rotation of said parts to form a transverse opening, and a securing element arranged in said opening and having portions cooperating respectively with said different parts to lock said parts together with a wedging action, said securing element upon adjustment thereof exerting its wedging action substantially wholly in a direction to move said parts oppositely longitudinally of the axis of the joint to bind the threads.

' 4. In combination, a pair. of threadedly connected members respectively carrying oppositely facing surfaceswhich face longitudinally of said members and approach each other on relative rotation between said members in the direction to effect disconnection thereof, and means adjustable, irrespective of the angular position of the threadedly connected members relative to each other, to engage said surfaces to preclude approach thereof.

5. The combination with a member having a bore and a relatively rotatable member having a cylindrical portion extending within said bore, of a device for locking said members together including means forming a slot internally in said first mentioned member and at one side thereof and means forming an annular groove on the outer periphery .of said second mentioned member, said slot and groove cooperating to form a transverse opening between said members having relatively inclined surfaces facing oppositely -with respect to each other and each facing generally longitudinally of said members, and a wedge driven in said opening and engaging said members for locking the members together with a wedging action.

6. In combination, a pair of members threadedly connectible by relative rotation upon a common axis, and means for preventing undesired separation of said members including a wedge extending in lines tangential to a cylinder of substantial diameter struck from said common axis and means on said members providing oppositely facing surfaces each facing generally longitudinally of said common axis, one on one of said members and the other on the other of said members and both engaged by said wedge and pressed apart by the latter, and cut by a plane which includes said axis and is perpendicular to said tangential lines.

7. In combination, a'member having a threaded bore, a member having a threaded portion receivable in said bore and'adapted to have its threads engage the threads of said bore, an annular groove in the periphery of said second member, said first mentioned member having a recess therein providing an inclined wedging surface facing generally longitudinally thereof but at an angle to a plane to which the axis of the threaded bore of said member is perpendicular, said recess lying substantially in the same general transverse planes with said groove, when said threaded parts are in desired engaged relation, and a wedge receivable in part in said recess and in part in said groove and cooperating with the said inclined wedging surface and with a generally oppositely facing edge of said groove to hold said parts in engaged relation.

8. In combination, a member having a bore therein and a recess communicating with said bore and providing an inclined wedging surface facing generally longitudinally of said member and at an angle to a plane to which the axis of said bore is perpendicular, a member having a portion receivable in said bore and having a peripheral groove, said members having threaded portions cooperating to connect said members and said groove and recess lying substantially in the same planes transverse to the axis of said bore when said members are in desired coupled relation, and a wedge receivable in part in said recess and in part in said groove and cooperating with said inclined wedging surface and with a generally oppositely facing edge of the groove to prevent unscrewing of the aforesaid threaded portions.

FRANK E. SINCLAIR. 

